Ruby gotchas

ruby-talk
1

I've written up some ruby gotchas that have come up while using ruby.
I'm wondering if there are any other gotchas that I should be
aware of.
The list is available at:
http://hasno.info/2006/12/14/ruby-gotchas-and-caveats

A nice list. I don't think I can add any to that, because your list
largely seems to stem from what violated your personal expectations. For
example, I'm used to JavaScript and Lua where the logical AND and OR
operators (by their various names) do act as guards that return the
first value that answers the question, never 'producing' a boolean
value. Additionally, nil and false are the only non-truth values in Lua,
too.

One comment about your item #8 - you might want to mention that 1.0/2 or
1/2.0 *is* 0.5. Your wording implies (to the novice reader) that you
need to include 'mathn' for math to work properly.

···

From: Mark Guzman [mailto:segfault@hasno.info]

2

Gavin Kistner wrote:

From: Mark Guzman [mailto:segfault@hasno.info]
  

I've written up some ruby gotchas that have come up while using ruby.
I'm wondering if there are any other gotchas that I should be
aware of.
The list is available at:
http://hasno.info/2006/12/14/ruby-gotchas-and-caveats
    
A nice list. I don't think I can add any to that, because your list
largely seems to stem from what violated your personal expectations. For
example, I'm used to JavaScript and Lua where the logical AND and OR
operators (by their various names) do act as guards that return the
first value that answers the question, never 'producing' a boolean
value. Additionally, nil and false are the only non-truth values in Lua,
too.
  

Yes, I should probably qualify it at the start. I'm coming from a
java/c#/c background and a lot of things stem from that.

One comment about your item #8 - you might want to mention that 1.0/2 or
1/2.0 *is* 0.5. Your wording implies (to the novice reader) that you
need to include 'mathn' for math to work properly.
  

Good point, I'll update it.
  --mark

···

--
sic transit gloria et adulescentia
blog | http://hasno.info
wiki | http://wiki.hasno.info